Imported Upstream version 5.18.0.207

Former-commit-id: 3b152f462918d427ce18620a2cbe4f8b79650449

external/llvm/test/Other/cgscc-libcall-update.ll

@@ -1,76 +0,0 @@
-; Make sure that the CGSCC pass manager can handle when instcombine simplifies
-; one libcall into an unrelated libcall and update the call graph accordingly.
-;
-; Also check that it can handle inlining *removing* a libcall entirely.
-;
-; Finally, we include some recursive patterns and forced analysis invaliadtion
-; that can trigger infinite CGSCC refinement if not handled correctly.
-;
-; RUN: opt -passes='cgscc(inline,function(instcombine,invalidate<all>))' -S < %s | FileCheck %s
-
-define i8* @wibble(i8* %arg1, i8* %arg2) {
-; CHECK-LABEL: define i8* @wibble(
-bb:
-  %tmp = alloca [1024 x i8], align 16
-  %tmp2 = getelementptr inbounds [1024 x i8], [1024 x i8]* %tmp, i64 0, i64 0
-  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %tmp2, i8* %arg1, i64 1024, i32 0, i1 false)
-; CHECK:         call void @llvm.memcpy
-  %tmp3 = call i64 @llvm.objectsize.i64.p0i8(i8* %tmp2, i1 false, i1 true)
-  %tmp4 = call i8* @__strncpy_chk(i8* %arg2, i8* %tmp2, i64 1023, i64 %tmp3)
-; CHECK-NOT:     call
-; CHECK:         call i8* @strncpy(i8* %arg2, i8* nonnull %tmp2, i64 1023)
-; CHECK-NOT:     call
-
-  ret i8* %tmp4
-; CHECK:         ret
-}
-
-define i8* @strncpy(i8* %arg1, i8* %arg2, i64 %size) noinline {
-bb:
-  %result = call i8* @my_special_strncpy(i8* %arg1, i8* %arg2, i64 %size)
-  ret i8* %result
-}
-
-declare i8* @my_special_strncpy(i8* %arg1, i8* %arg2, i64 %size)
-
-declare i64 @llvm.objectsize.i64.p0i8(i8*, i1, i1)
-
-declare i8* @__strncpy_chk(i8*, i8*, i64, i64)
-
-declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32, i1)
-
-; Check that even when we completely remove a libcall we don't get the call
-; graph wrong once we handle libcalls in the call graph specially to address
-; the above case.
-define i32 @hoge(i32* %arg1) {
-; CHECK-LABEL: define i32 @hoge(
-bb:
-  %tmp41 = load i32*, i32** null
-  %tmp6 = load i32, i32* %arg1
-  %tmp7 = call i32 @ntohl(i32 %tmp6)
-; CHECK-NOT: call i32 @ntohl
-  ret i32 %tmp7
-; CHECK: ret i32
-}
-
-; Even though this function is not used, it should be retained as it may be
-; used when doing further libcall transformations.
-define internal i32 @ntohl(i32 %x) {
-; CHECK-LABEL: define internal i32 @ntohl(
-entry:
-  %and2 = lshr i32 %x, 8
-  %shr = and i32 %and2, 65280
-  ret i32 %shr
-}
-
-define i64 @write(i32 %i, i8* %p, i64 %j) {
-entry:
-  %val = call i64 @write_wrapper(i32 %i, i8* %p, i64 %j) noinline
-  ret i64 %val
-}
-
-define i64 @write_wrapper(i32 %i, i8* %p, i64 %j) {
-entry:
-  %val = call i64 @write(i32 %i, i8* %p, i64 %j) noinline
-  ret i64 %val
-}